coherence can sync the following types out of the box:
bool
int
uint
byte
char
short
ushort
float
string
Vector2
Vector3
Quaternion
GameObject
Transform
RectTransform
CoherenceSync
SerializeEntityID
byte[]
long
ulong
Int64
UInt64
Color
double
RectTransform
is still in experimental phase - use at your own discretion!